John R. Stallings, Date of Birth, Place of Birth, Date of Death

John R. Stallings

American mathematician

Date of Birth: 22-Jul-1935

Place of Birth: Morrilton, Arkansas, United States

Date of Death: 24-Nov-2008

Profession: mathematician, university teacher, topologist

Nationality: United States

Zodiac Sign: Cancer

John Robert Stallings Jr.
(July 22, 1935 – November 24, 2008) was a mathematician known for his seminal contributions to geometric group theory and 3-manifold topology.
Stallings was a Professor Emeritus in the Department of Mathematics at the University of California at Berkeley where he had been a faculty member since 1967.
He published over 50 papers, predominantly in the areas of geometric group theory and the topology of 3-manifolds.
Stallings' most important contributions include a proof, in a 1960 paper, of the Poincaré Conjecture in dimensions greater than six and a proof, in a 1971 paper, of the Stallings theorem about ends of groups.

George Bergman (1943–)

	Alternative names	George M. Bergman
	Description	American university teacher
	Date of birth	22 July 1943
	Location of birth	Brooklyn
	Authority control	: Q16198978 VIAF: 36173960 ISNI: 0000 0001 1054 507X LCCN: n96003979 MGP: 32848 GND: 172970725 WorldCat